Name: Test (Newton's Laws) Explain each question thoroughly (3 points each) 1. Distinguish clearly between the terms speed and velocity. 2. Distinguish clearly between the terms mass and weight. 3. Define Newton's 3 Laws of Motion in your own words. For each of the following interactions, identify action and reaction forces (2 points each) 4. A hammer hits a nail 5. A woman walking on the ground 6. A wave hits a rocky shore 7. A tennis player hits a tennis ball with a tennis racquet 8. A ball is thrown against a wall Solve each problem and show your work (10 points each). 9. If a motorist averages 65 km/h and drives for 9 hours/day, how many days will be needed to cover the 3700 km distance by road from Chicago to San Francisco?Solve each problem and show your work (10 points each). 9. If a motorist averages 65 km/h and drives for 9 hours/day, how many days will be needed to cover the 3700 km distance by road from Chicago to San Francisco? 10. A car moving at 80 km/h is brought to a stop in 3 s. What is its average acceleration (in m/s 2) in this period? 11. A force of 20-N acts on a body at rest on a table. The body's weight is 8 N. What is the body's mass? What is its acceleration? 12. An arrow is shot vertically upward with an initial velocity of 80 ft/s. a) How long will it rise? b) How high will it rise? c) What are its position and velocity after 2 s? d) What are its position and velocity after 6 s? 13. An airplane is in level flight at a speed of 200 m's and an altitude of 2400 m when a windshield wiper falls off. What will the wiper's speed be when it reaches the ground? May need to use vector addition. 14. A parachutist whose total mass is 100 kg is falling at 50 m/'s when her parachute opens. Her speed drops to 8 m/s in 3 s. What is the total force her harness had to withstand? How many times her weight is this force?15. The 200-g head of a golf club moves at 40 m/'s in a circular arc of 1.2 m radius. How much force must the player exert on the handle of the club to prevent it from flying out of her hands at the bottom of the swing? 16. A bull and a cow elephant, each of mass 2000 kg, attract each other. Gravitationally with a force of 2 x 10 5 N. How far apart are they? BONUS (5 points): Derive t = starting with d = vt g